Question

A string breaks if its tension exceeds 10 newtons.A stone of mass 250 gm tied to this string of length 10 cm and is rotated in a horizontal circle. The maximum angular velocity of rotation can be:
(1) 20 rad/s
(2)40 rad/s
(3) 100 rad/s
(4) 200 rad/s



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Answer 1

The answer is 2 one ☝ is answer

Answer 2

Answer:

20 rad/s

Explanation:

$force = mr {w}^{2} \\ 10 = \frac{250 \times 10 \times {w}^{2} }{1000 \times 100} \\ 10 = \frac{25 {w}^{2} }{1000} \\ {w}^{2} = \frac{10000}{25} \\ \: {w}^{2} = 400 \\ w= \sqrt{400} = 20$

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